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Statement

Given four numbers $a, b, c, d$, determine whether a parallelogram can be formed with sides of lengths $a, b, c, d$.

Input

The input contains a line of four integers representing $a, b, c, d$ respectively, where $(0 < a, b, c, d \leqslant 1 \times 10^{18})$ and they are separated by spaces.

Output

If a parallelogram can be formed, output Yes; otherwise, output No. The answer is not case-sensitive, and yEs and YEs are both considered as Yes.

Samples

1 1 4 5

No

1 2 1 2

Yes